Development of microwave cavities for measurement of muonium hyperfine structure at J-PARC
Abstract
The MuSEUM collaboration is planning measurements of the ground-state hyperfine structure (HFS) of muonium at the Japan Proton Accelerator Research Complex (J-PARC), Materials and Life Science Experimental Facility. The high-intensity beam that will soon be available, the H-line, allows for more precise measurements by one order of magnitude. We plan to conduct two staged measurements. First, we will measure the Mu-HFS in a near-zero magnetic field, and thereafter we will measure it in a strong magnetic field. We have developed two microwave cavities for this purpose. Furthermore, we evaluated the systematic uncertainties from such a fluctuation of microwave fields and confirmed the requirements for the microwave system; we use a microwave field distribution calculated with the finite element method.
- Publication:
-
Progress of Theoretical and Experimental Physics
- Pub Date:
- May 2021
- DOI:
- 10.1093/ptep/ptab047
- arXiv:
- arXiv:2104.06663
- Bibcode:
- 2021PTEP.2021e3C01T
- Keywords:
-
- C07;
- C31;
- Physics - Instrumentation and Detectors;
- High Energy Physics - Experiment;
- Physics - Atomic Physics
- E-Print:
- Progress of Theoretical and Experimental Physics, Volume 2021, Issue 5, May 2021, 053C01